Oil strainer



C. STRACHAN ET AL 4 OIL STRAINER Fil 8 20, 1922 2 Sheets-Shesl awmwtoza [f 577M CHAN may . c. STRACHANET AL v OIL STRAINER Filed Dec. 20, 1922 2 Sheets-Sheet 2 l 4 314 Dante Lo w 1 I 0...]: /RISH I fluoweq Patented Nov. 11, 1924.

CHRISTOPHER STRAGHAN, OF SOUTH ORANGE, NEW JERSEY, AND DAVID J. IRISH, OF ST. GEORGE, NEW YORK, ASSIGNORS '10 MORSE DRY DOCK & REPAIR 00., NEW YORK, N. Y., A CORPORATION OF NEW YORK.

OIL STRAINER.

Application filed. December 20, 1922. Serial No. 808,121.

To all whom it may concern:

Be it known that we, CHRISTOPHER STRA- CHAN, a citizen of the United States, residing at So. Orange, county of Essex, and

4 State of New Jersey, and DAVID J. IRISH, a

citizen of the United States, residing at St.

George, Staten Island, in the county of Richmond and State of New York, have invented certain new and useful Improvew ments in Oil Strainers, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to improvements in strainers and has reference more particular 1y to devices of thisclass designed primarily for use in connection with oil burning systerms on steamships.

One object of the invention is toprovide a duplex strainer in which two straining cylinders and a valve for bringing one 01 the other into play, are disposed in extremely compact relation, which is of paramount importance on account of the cramped quarters in which oil burning systems must usuall be installed.

Knother object is to provide an improved straining means including 1 a plurality of concentric screens positioned in a cylinder,

these screens being bodily'removable as a.

single unit from the cylinder but being then capable of being easily disassembled. Thus, quick. and easy cleaning of thestraining means may be efiected.

With the foregoing in view, the inven-- tion resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying drawings.

Figure 1 is a front elevation, partly in section showing a strainer constructed in' accordance with the present invention.

Figure 2 is a top-plan view with parts broken away.

Figure 3 is a horizontal sectional view as indicated by lines 3--3 of Fig. 1.

Figure 4 is a vertical sectional view as indicated by line 44 of Fig. 2. r

Figure 5 is a vertical sectional viewtaken substantially on line 5-5 of Fig. 1.

section on line 66 of ig. 4. 1 Figures 7 and 8 are detail vertical 'tional views as indicated by lines 77 and.

Figure 6 is an enlar ed detail horizontal In the drawings above briefly described, the numerals 1 designate a pairof cylinders disposed side by side in close relation with each other and having their side walls integrally connected with each other as in. dicated at 2. The front portions of these walls converge toward the joined portions 2 and a cylindrical valve casing 3 is located in the angle of convergence this casing being integrally connected with the two cylinders. The casing 3 is provided with an inlet 4: and an outlet 5 and opposite sides of said cylinder are formed with two bosses 6 in the same plane as the inlet 4, and with additional bosses 7 in the plane of the outlet 5.. These. bosses'are integral with the casing 3 and the cylinders 1 and form rigid bracing means therefor as well as serving to contain inlet ports 6 and outlet ports 7*, all of these ports opening into the casing 3 and the cylinder 1, it bein of course understood that each of these cylinders is only provided with one inlet and one outlet port.

A preferably tapered plug valve 8 is located in the casing 3 and is formedwith a pair of L-shaped ports 9 and 10, the former being in the same plane with the ports 6 while the port 10 oo-operates with the ports 7. When the plug 8 is positioned as shown in Figs. 1 and 3, it will be seen that the oil entering through the inlet 4 will flow through the upper port 9 and through one of the ports 6 into one of the cylinders 1. In. this cylinder, the oil passes thro h straining means yet to be described and (115 charges through one of the orts 7 a and the port 10 to the oil outlet 5. 'le onestraining cylinder is thus operating, the other is idle but is in readiness to operate whenever the position of the valve 8 is reversed. It will thus be seen that by throwing either one of the cylinders into play, the straining means of the other may be cleaned 'or repaired a's occasion may require, without suse pending operation of the device.

Th upper ends of the cylinders 1 m P I closed ends of the cylinders may well be provided with appropriatedrain plugs 20. Within each of the cylinders 1, is a novel straining means but since the construction in both of these cylinders is the same, only one will be described. Near its closed lower end, the cylinder 1 is formed with an internal seat 21 around its wall, which seat is preferably beveled as shown, for the purpose of supporting the outermost of a plurality of concentric, nested rings 22, 23 and 24. The outer surface of the ring- 22 is beveled for contact with the seat 21 while the contacting surfacesof the rings 22, 23 and 24 are similarly beveled as indicated at 25,

V whereby ring 22 supports ring 23 and the latter in turn supports the innermost ring 24. Circumferentially spaced tie rods 26} are shown rising from the concentric rin s 22, 23 and 24, the upper ends of these rods being connected with inner, outer and intermediate concentric members 28, 29 and 30, the former being preferably a solid plate as shown. Screens 31 of annular form are dis osed in concentric relation around the several series of tie rods 26, these screens preferablybeing of different mesh as shown. The inner most of the screens 31 is carried by the member '28 andthe inner ring 24; and is the finest of the series; the outermost screen which is the coarsest mesh, is carried by the outer member 29 and the outer ring '22, while the intermediate screen has its ends connected with the member 30 and the intermediate ring 23. The several parts 22, 23,

24, 28, 29 and 30, are by preference formed I -with annular ribs 32 to "which the screens are brazed soldered or otherwise secured, as indicated at 33. v 1

The concentric members 28, 29 and 30 have their outer surfaces disposed in the same plane and they are held in this relation by a retaining bar 34 which extends across the outer sides of said members, said bar ing bar, it will be seen that when the closure 15 is opened, the entire straining means may be removed from the cylinders 1, the

central member 28 beingprovided with an appropriate bail 37 for this purpose. This bail. also serves to prevent the straining means from rising in the cylinders as will be clear by reference to Fig. 4. After the entire nest of stramers and carrying rings therefore has been removed from tlie cyli simple, inexpensive and compact relation of parts which possesses the advantages above pointed out. Also, the novel construction of the straining means which permits withdrawal as a unit from the cylinder, yet may be readily disassembled and cleaned when removed, is of importance, as will be appreciated by those familiar with the conditions under which strainers of this class must be use In general, excellent results may be obtained from the details disclosed and they may therefore be followed. It is to be understood however that within the scope of' this invention as claimed, numerous minor changes may be made.

We claim: I c

1. A strainer comprising a ing a removable closure at one end, an internal ring seat spaced from its other end, and inlet and outlet ports between the plane of said seat and the ends of the cylinder, a plurality of concentric nested rings, one of which is supported by said seat, said rings having coacting surfaces whereby any ring except said one ring is supported by an adj acent ring, a plurality of concentric screens in the cylinder connected at one end to said rings, and spacing and closing means for cylinder hav-" 3 of the innermost screen bein in communication with the aforesaid ot er end of the casing by means of the opening through the ginn'ermost of the rings. v

2. A duplex strainer comprising a pair of straining cylinders disposed side by side in close relation and having their side walls integrally connected, said side walls converging to their line of juncture with each other, a valve casing in the angle of convergence between said walls and integrally joined to the latter, said valve casing having an inlet and an outlet, bosses extendmg from the opposite sides of said valve casing and joined integrally thereto and to said side walls of said cylinders, said bosses having inlet and outlet ports for the two cylinders opening into said valve casing, and a valve in said casing for placing its inlet and out let in communication with the ports of either cylinder.

3. A. strainer comprising a cylinder having a removable closure at one end, an internalseat spaced from its other end and inlet and outlet ports between said seat and the ends of the cylinder, a plurality of concentric nestedrings, the outermost of which engages said seat, an equal plurality of concentric screens in the cylinder connected at 0 1 end to said rings, and additional concentric nested members connected to the other ends I surrounding rlng.

5. A structure as specified in claim 3;

'said rings having coacting surfaces where 1 by any ring is supported by the immediately surrounding ring, and a retaining bar ex-' tending across said additional concentric members and connected at its ends to the outermost thereof to-retain said members, said screens and said rings assembled as a single unit.

In testlmony whereof We hereunto aflix our signatures. r.

CHRISTOPHER STRACHAN. DAVID J. IRISH. 

